Valve and seat therefor



July 28 '1931 P. R. G, BIEDERMANN 1,816,205

VALVE AND SEAT THEREFOR Filed May 1l. 1925 I mvg/WOR. PRGBIEDEQMAHH 1ATTORNEY.

PatentedJuly 28,` 1931 .PATENT oli-FICE rAUL RoBnRfr GEORGE BIEDERMANN,on nos ANGELES, CALIFORNIA VALVE AND SEAT THEREFOR Application filed May11,

My invention relates to an improved valve,

and a novel form of seat therefor, .in which said seat willv effectivelybe prevented from Vx scoring, no matter what sort of fluid maybe '5 usedtherein, either gaseous or liquid, or

whether said gas or liquid contains foreign substances of any size orcharacter, said valve being especially adapted for use in connec- A tonwith slush or otherpumpsor internal 10, combustion engines, or in fact,with any other form of pump or motor where such a valve is desired.

As is well known, it is a desideratum in engineering practice to providefor a tight U15 seal between the active member of a valve and its seator inactive member, and at the same time to prevent both of said membersfrom scoring, no matter what sort of fluid may be used therewith, or thesize and character of the foreign matter said fluid contains.

, In slush pumps and the like it has been found in practice that sandand gravel often lodge between the valve and its seat, preventing thetight closing thereof, and at the same time causing a very rapid wear of both the valve and its seat, especially wherea more or lessflexibleva'lve seatis used.Y Further, inl oil well drilling the valvesassociated with the pumps must be so constructed thatthe gas in the wellwill be as ineffective as possible to cause any deterioration oftheflexible valve' disc ordinarily used, and which usually t iscomposed ofa rubber compound of some sort.

ing discharged inbut one direction; that is,

toward the outlet, resulting, asis obvious, in

an uneven Lwearover only aportion of the to leak, and thus causesslippage in the pump.

It accordingly is an objectof my invention to provide a valve in whichall of the above objectionable features are effectively eliminated, wearin said valve being reduced to a minimum, and its seat being absolutelynonscoring, and eliminating effectively. anypossibility of valveleakage. v

A further obj ect of l y invention is to provide a novel form of valveand seat there- In all the valves heretofore proposed a Y straightinlethas been provided, the fluid be-` n valve seat, which wear soon causesthevalve 1925. Serial No. 29,435.

for, in which a resilient or flexible member 1s arranged to form an aircushion which is .adapted effectively to remove any foreign matter.`which may become lodged between saidmembers and the valve seat. v f Itis ralso an object of my invention tovpro.-

vide a novel form of valve in which the active member thereof isequipped' with a cap Ahousing a novel form of resilient member, whichcap is adapted to reduce to a minimum the deleterious effect of gas,when said device vis* used in connection with an oil well, which memberhas also associated therewith a means for preventing 1t from creeping,said means, if desired, being in the form of one or more circularridges, the seat or inactive member of said valve being curved, so thata o fective in operation, practically impossible 'i y to get out oforder, and which willthoroughly and reliably effect the objectsintended. n Further objects and advantagesof my invention will becomemore apparent' as the description thereof proceeds. K I

Reference is had to the" accompanying drawings, in which similar.reference characters denote similar parts. ings, i Y,

Fig. l is an elevational view of-fmy. novel form of valve and its seat,showing vsaid valve in closed condition,

Fig. 2 is a part sectional and a part elevational view of the valve andits seat, Fig. 3 is a bottom plan view vof Fig. l.

i In theV draw -Fig. i is a part sectional and part'eleva- ,Y

tional viewv showing the valve fully opened, and the manner in which thefluidis distributed in all. directions over the valve seat,

valve stem.

Describing my invention more in detail, my improved valve is composed oftwo parts, an active member, constituting the valve proper, and aninactive member' comprising the admission member for the uid and theseat against which the active member acts.

The active member comprises a valve stem S equipped with a set ofconventionally formed grooves l to provide for the release of the fluid,and said stem has integral therewith, or Secured thereto in any desiredmanner a cap C constructed as more particularly shown in Fig. 2, saidcap being used to protect a` resilient element or washer R constructedpreferably of a pliant material such as rubber, rubber composition, fromthe deleterious ellect of especially when my improved valve is used inoil well practice.

The resilient member ll securely held within the "ap C by means of asleeve 5, shaped and constructed shown, and positioned in any preferredmanner en a guide stem 2, preferably, thong.- not necessarily, screwthreaded to said guide stem, a lock nut 7 being provided to lool: saidsleeve on said stem. The flange of the sleeve 5 positioned in thecentral hole the flexible or resilient member R, and if desired, theguide stem Q may either be screw threaded into the valve stem S orsecured thereto in any other preferred manner, or said guide stem may beformed integral with said valve stem The resilient element R is providedwith a hollowed out portion A to provide a space between said elementand the cap C to provide an air cushion, the purpose of which ispresently to be iplained. As will be observed from Fig. 2, the element Rheld within the cap C in such a. manner that its bottom portion will beslightly bulged for a purpose presently to be explained. rlhe sleeve 5is equipped with a flanged portion positioned underneath the flexibleelement R and said flange is provided with one or more circular ridges 6of preferably triangular cross-section, which ridges are adapted to biteinto the element R to prevent the same from creeping.

The inactive member of my valve comprises a preferably cylindricalcombined fluid admission member and valve seat, said member having abridge portion 3, preferably shaped as more particularly shown in Fig.3, to provide for a maximum admission opening for the fluid. Moreover,as shown in said figure, the cylindrical portion of the inactive memberis tapered as shown to increase the opening for the aomission of theHuid. The bridge portion 3 has its intermediate portion bored to receivea bushing or other member Il, which bushing may be removed at intervalswhen it becomes worn and replaced. Said bushing, if desired, may beconstructed of tempered steel so as to resist wear. Y

As shown more particularly in Figs. 2 and Zl, the inactive member S isequipped with a curved seat 9, said curve being such that asubstantially linear contact may be maintained with the bulged member Rof the active member. [is is well mown, it is very difficult to maintaina tight seal between two flat surfaces; hence, the feature of curvingboth active and inactive members 'to provide a line contact is ofextreme importance. lf flat surfaces were used, as hasheretofore beendone in practice, should the smallest grain of sand, for example, belodged between such surfac s, a perfect closure would be prevented.llith my invention, there is but a substanti ally single line Contact,the sealing surface increasing as the pressure increases.

lf it should Laopen that grit or other foreign matter become lodgedbetween the me nber and the seat 9, the air in the air cus iion beingcompressed will, as the valve rises from the seat 9, insta itly dislodgethe same the instant the valve opens.

The center guide stem 2 provides for a true vertical up and downmovement of the valve, reducing wear to a minimum, the only possibilityof wear residing in the bushing 4, which, as above explained, may berenewed from time to time, without removing the inactive member from thepump. Valves of the type described have proven very successful inpractice, having met successfully all operating requirements.

lhile l have described and illustrated an air cushion merely, it will beclear that ll do not desire to be limited to such a feature, as inpractice l may use instead compounds of different character to providefor great resiliency, and, if desired, may even use other means toreplace said air cushion.

is hereinbefore explained, ample fluid inlet space is provided in theinactive member by reason of its tapered configuration and by reason ofthe shape and taper of the bridge portion lt will be observed also thatthe fluid is not discharged in only one direction, that is, toward theoutlet of the valve, but flows over the valve seat 9 in all directions,as indicated by the broken lines VJ in ll, thus eliminating wear, andpreventing leakage, said fluid being discharged very evenly over allparts of said seat, positively preventing scoring.. and reducing to aminimum the wear caused by the friction of the fluid.

lfhile l have thus described my invention with great particularity, itwill be clear that the same .may be modified throughout a wide range. Iaccordingly do not propose to be limited to the exact details ofconstruction 4shown and described, but reserve the right in practice tomalte any and all modifications thereof that fall within the scope ofthe appended claims.

I claim as my invention:

l. A valve construction comprising a valve seat, a valve stem adapted tobe moved through a perforation in said seat, a. valve cap detachablyassociated withsaid stem, and a flat hollowed-out open resilient insertsecurely held in said cap, said hollowed-out portion functioning toprovide an air cushion between said cap and said insert, said valve seatbeing so constructed that when said valve is closed, a substantiallylinear contact merely will be maintained between said insert and saidseat.

2. In a valve, a hollow cylindrical body through which a fluid isadapted to pass, said body having an inwardly directed 'double arcuatethroat forming a fluid checking out let from said body, and providedwith an outwardly flowing cu'rviform seat which is contiguousand incurved alignment with said arcuate throat. n c

3. In a valve, 1n combinatlon, a stem, a cap associated with sald stem,an insert clamped within said cap, said insert being hollowed-out so'asto provide an air cushion between said cap and said insert, and a convexseat for said valve, said insert and said seat when said valve is closedbeing adapted to coact, in a manner such that a substantial linearcontact will be maintained therebe*V tween.

4. In a valve, in combination, a stem, a subn stantially free andunobstructed curved and tapered inlet therefor, a convex seat for said nvalve, an inverted cup-shaped top member on said stem, adapted formovement relative to said seat, an annular insert positioned in saidmember, a cup-shaped flanged element positioned in the opening in saidannular member, and means on said flange for preventing creeping of saidinsert.

5. In a valve, in combination, an insert in I said valve, said insertcomprising an annular member cut away on its top to provide an aircushion therein., a skeleton base, a cylindrical body member extendingupwardly from said base, said member being equipped internally with atapered cut-away portion defining a ledge extending inwardly from saidmember, `and a convex seat on said member, said ledge functioning tocheck the Vvelocity of the fluid as it enters said bod member wherebyscoring of said seat isc fectively prevented. l

6. In a valve, and seat therefor, in combination, a pair of relativelymovable members, one of said members comprising a cap, an insert in saidcap, said insert comprlsingan annular member cut away on its top topro-L upon the other off said members whereby scoring of said seat mayeffectively be pre-" vented.

7. In a valve, a hollow cylindrical bc'jdyl through which a fluid isadapted to pass, said vbody having a gradually inward reversely curvingoutlet throat diametrically smaller than the inlet to said body to checkthe travel'of fluid therethrough, and an outwardly flowing curving seat,a valve co-operating with said seat and yielding means in said valve anddisposed in the direct path` of the fluid discharging from said throatto buffet the force, and cause the discharge of the fluid between saidvalve and body.

8. In a valve, a hollow cylindrical body name to this specification.

PAUL ROBERT GEORGE BIEDERMANN.

vide an air cushion therein, the other of said Y members being providedwith a tapered cutaway portion, defining an annular ledge, said taperedcut-away portion functioning to check the velocity of the fluid as itenters one of said members and to direct said fluid

